There's a few things in this one that may be of interest to some of you...

For Kindle Fire users - two new options:

Check MOBI -> Check Twitter/Facebook disabled - looks for an identical ASIN present in both EXTH 113 & 504, if not found displays the book.

Fix -> Fix MOBI ASIN for Kindle Fire - gets whatever asin/amazon identifier you have associated with that book and writes it into EXTH 113 & 504 (uses a random id if no identifier found). Also sets cdetype in 501 to EBOK. Should save users faffing around with external MOBI editors (or doing a conversion) provided it works of course (I don't have a Fire to test it with so please feedback to me).

my work schedule got changed at the last minute so I can't play with this until tomorrow evening. although sleep is overrated, so maybe I can manipulate a few files tonight...